diff --git a/test/test_compound_identifier.py b/test/test_compound_identifier.py
index 2d56865c2..236e6df6f 100644
--- a/test/test_compound_identifier.py
+++ b/test/test_compound_identifier.py
@@ -24,18 +24,3 @@ def test_is_key_header_positive(compound_identifier, header):
 def test_is_key_header_negative(compound_identifier, header):
     """Test that invalid key headers return False."""
     assert compound_identifier.is_key_header(header) is False
-
-@pytest.mark.parametrize("header", ["output", "invalid", "InChI", "inchikey"])
-def test_is_input_header_negative(compound_identifier, header):
-    """Test that invalid input headers return False."""
-    assert compound_identifier.is_input_header(header) is False
-
-@pytest.mark.parametrize("header", ["inchikey", "key", "INCHIKEY", "KEY"])
-def test_is_key_header_positive(compound_identifier, header):
-    """Test that valid key headers return True."""
-    assert compound_identifier.is_key_header(header) is True
-
-@pytest.mark.parametrize("header", ["smiles", "input", "invalid", "123","someHeader"])
-def test_is_key_header_negative(compound_identifier, header):
-    """Test that invalid key headers return False."""
-    assert compound_identifier.is_key_header(header) is False
\ No newline at end of file